Rotary cooler



Feb. 15, 1927.

A. W. LISSAUER E L ROTARY COOLER Filed Feb. 2, 1926 INVENTOR? .406 Lam 1m wd o;

TTORNEV Patented Feb. 15, 1927.

UNITED STATES PATENT OFFICE; I

' ADOL PH 'W. LISSAUER AND JULIUS CREDO, LOUISVILLE, KENTUCKY, ASSIGNORS TO LOUISVILLE DRYING HACIIINERY CO. INC., 0]? LOUISVILLE, KENTUCKY, A COR- PORATION OF KENTUCKY.

ROTARY COOLER.

Application filed February ()ur invention relates to a rotary cooler which is practically dust-tight and which has a large cooling surface for a comparatively small over-all dimension.

Another object of the invention is to provide a cooler which can be used for substances that are apt to form explosive mixtures with an excess of air.

In the appended drawing, Figure 1 is a longitudinal section on a line 1-1., Figure 2.

Figure 2 is an end elevation of the charge receiving end of the cooler, and

Figure 3 is a transverse section on line 3-3, Figure 1, illustrating the discharge end of the cooler.

Referring to the drawings. 5 is a cylindrical drum provided at each end with a head 6. Each of the heads has an annular chamber 7, united by tubes 8 which extend through the drum in proximity of its inner periphery and through which tubes the two chambers are in communication. These tubes therefore form an annular row Within the drum. I 1

Each of the heads has a transverse conduit 9 which is depressed from the plane of the head into the drum so as to afford more room at the heads. In addition, by depressing the conduits 9, the same are rendered more fi exi-,

ble to provide the necessary, play requiredfor changes in temperature. Each of the conduits 9 has a pipe 10 projecting through the axis of the corresponding head and leading out of the drum. Each of the pipeslO is provided with a 'stuiiing box 11, which couples the pipe 10 to a pipe 12, the pipes 12 being stationary.

The head 6 at the charging end of the drum has a stationary housing 13 on which it is revolubly mounted. This housing is provided with a feeding hopper 14, same being in dotted and dash line in Figure 1, through which the material to be dried is continually fed. A manhole 14 is also provided in the housing 13. The charging head 6 also carries feeder blades 15 which force the material passing through the hopper away from the head 6.

The head 6 at the discharge end of the cooler is provided with a series of spiral blades 16 so arranged that the material talling thereunto is carried by the blades on a cone 17. This cone 17 is disposed coaxial- 2, 1926. Serial No. 85,528.

ly with the discharge head and is pointing outwardly. The discharge head 6 is also provided with a flaring out opening 18 into which the cone enters and from where the material is delivered by'the cooler.

The drum 5 is mounted on rollers 19 so that there'is a pitch from the inlet to the outlet end of the cooler. A gear 20 is secured to the drum and to which motion is imparted by a pinion 21 connected to a drive shaft 22. Longitudinal motion of the dryer is prevented by rollers 23.

The material entering the-cooler through the hopper 14 is tossed along on and from the tubes 8 in its movement from the inlet to the outlet end. ing fluid, such as water. is circulated, the fluid entering the tube 12 atthe discharge end of the cooler and leaving the tube 12 at the inlet end of the same. In other words,

. the direction of the cooling medium and the material to be cooled are in opposite directions.

This type of cooler is particularly suitable I for drying materials of the type which are apt to formexplosive mixtures with an.ex-'

cess of air. As an example, charcoal may be cited. for 1n this type of cooler no air is used for cooling. and very little of same can enter, due to the fact that material is continually charged through the .cooler and the inlet and outlet heads have restricted openings. Furthermore. by providing an annular series of tubes 8 in the periphery of the drum a very large cooling surface is provided for a comparatively small over-all dimension of the cooler, thereby forming a cooler othigh capacity. We claim 1. In a revoluble cooler a revoluble discharge head having an outwardly flaring opening coaxial with the head, a cone at the opening pointing thereto and revoluble with the head, a plurality of spiral blades revoluble with the head for directing the material on to the cooler and a supply pipe for a cooling medium passing through said opening and cone into said head.

2. In a revoluble cooler a drum mounted Through the tubes 8, a coolto revolve and having an inlet and a disthe annular chambers of the heads, pipes from each of the annular heads disposed transversely of the drum and depressed into the drum from each of the heads, an axial pipe to each of the transverse pipes extending through the adjacent head and out of same, stationary means closing the inlet head, a hopper associated with said means for feeding material into the drum, the discharge head having an dutwardly flarin ing, a cone carried by the hea ing toward the opening, and a series of spiral blades associated with the discharge end of the drum for leading the material on to the cone and out of the axial opening.

ADOLPH W. DISSAUER. JULIUS CREDO.

and pointaxial open- 10 

